1) The procedure here is to perform a Quick Format to the memory card using the BlackVue recorder.2) It is recommended by the manufacturer to format the SD card at least once a month as to maintain the recording stability of the memory card. 3) While the unit is recording (REC LED is blinking), press and hold the WiFi or Function button for about 10 seconds, the BlackVue will prompt "Beep" sound and with voice message "Formatting SD card, please do not switch off the power....", you can release the button now. ​4) After about 20 seconds later, the unit will prompt "BlackVue for your safe driving, starting normal recording..."

5) Please back up your important files before perform the formatting. (All files will be deleted upon the formatting process). ​6) If the memory card still not performing normally, it is recommended to be formatted by using SD card formatter software. Procedure can be found here.